3686850405 has 64 divisors (see below), whose sum is σ = 7643712000. Its totient is φ = 1685396160.

The previous prime is 3686850379. The next prime is 3686850437. The reversal of 3686850405 is 5040586863.

It is not a de Polignac number, because 3686850405 - 2¹² = 3686846309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6495 + ... + 86115.

It is an arithmetic number, because the mean of its divisors is an integer number (119433000).

Almost surely, 2^3686850405 is an apocalyptic number.

3686850405 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3686850405 is an abundant number, since it is smaller than the sum of its proper divisors (3956861595).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3686850405 is an equidigital number, since it uses as much as digits as its factorization.

3686850405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79656 (or 79636 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The square root of 3686850405 is about 60719.4400912920. The cubic root of 3686850405 is about 1544.8459267604.

The spelling of 3686850405 in words is "three billion, six hundred eighty-six million, eight hundred fifty thousand, four hundred five".